completed SMS gateway project

app/controllers/application_controller.rb

@@ -0,0 +1,22 @@
+class ApplicationController < ActionController::API
+  rescue_from ActiveRecord::RecordNotFound, with: :render_not_found
+  rescue_from ActiveRecord::RecordInvalid, with: :render_unprocessable
+  rescue_from ActionController::ParameterMissing, with: :render_bad_request
+
+  private
+
+  def render_not_found(exception)
+    render json: { error: exception.message }, status: :not_found
+  end
+
+  def render_unprocessable(exception)
+    render json: {
+      error: exception.message,
+      details: exception.record.errors.full_messages
+    }, status: :unprocessable_entity
+  end
+
+  def render_bad_request(exception)
+    render json: { error: exception.message }, status: :bad_request
+  end
+end